[tex] \frac{3(x+5)}{2} \cdot 2=21\cdot 2 [/tex]
Above step we use "Multiplication property of equality"
[tex] 3(x+5)=42 [/tex]
In the above step we "Simplify on both sides of equation"
[tex] 3x+15 = 42 [/tex]
In the above step we use "Distribution property"
[tex] 3x+15-15=42-15 [/tex]
The above step is the result of using "Subtraction property of equality"
[tex] 3x=27 [/tex]
Above step is result of "Combining the like terms"
[tex] \frac{3x}{3} =\frac{27}{3} [/tex]
Above step is the result of using "Division property of equality"
[tex] x=9 [/tex]
Above step is result of "Simplifying fractions on either side of equation"
